Before using Phentermine

Before using Phentermine :

Some medical conditions may interact with Phentermine . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
if you are pregnant, planning to become pregnant, or are breast-feeding
if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
if you have allergies to medicines, foods, or other substances
if you have a brain or spinal cord disorder, hardening of the arteries, high blood pressure, diabetes, or high cholesterol or lipid levels

Some MEDICINES MAY INTERACT with Phentermine . Tell your health care provider if you are taking any other medicines, especially any of the following:
Dexfenfluramine, fenfluramine, furazolidone, or MAOIs (eg, phenelzine) because the risk of serious side effects, such as increasing headache, high blood pressure, slow heart rate, elevated temperature, or possibly fatal lung problems, may be increased
Serotonin specific reuptake inhibitors (eg, fluoxetine) because the risk of their side effects may be increased by Phentermine
Guanadrel or guanethidine because their effectiveness may be decreased by Phentermine

Ask your health care provider if Phentermine may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.